US6722579B1 - Fuel injection valve - Google Patents
Fuel injection valve Download PDFInfo
- Publication number
- US6722579B1 US6722579B1 US09/830,275 US83027501A US6722579B1 US 6722579 B1 US6722579 B1 US 6722579B1 US 83027501 A US83027501 A US 83027501A US 6722579 B1 US6722579 B1 US 6722579B1
- Authority
- US
- United States
- Prior art keywords
- compensation
- fuel injection
- injection valve
- compensation piston
- actuating part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
- F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
Definitions
- the invention relates to a fuel injection valve having a valve body, which contains a movable injector needle, an having actuating part, which supports the injector needle and communicates with a control pressure chamber, and having a compensation chamber, which communicates with a compensation piston.
- a fuel injection valve of the type with which this invention is concerned has been disclosed by DE 197 27 896 A1.
- the compensation chamber is used to compensate for an opening force which acts on the injector needle after it opens. This occurs because when the injector needle lifts up from its valve seat, an additional area is acted on by high-pressure so that forces that increase up to a limit value act on the injector needle in the opening direction.
- a compensating force which counteracts the opening force is produced in the compensation chamber.
- the actuating part is provided with an annular shoulder that is disposed inside the compensation chamber.
- the compensation chamber is filled with a fluid, for example the fuel to be injected, so that a hydraulic chamber is produced which is closed but whose volume can be displaced by the movement of the compensation piston.
- a fluid for example the fuel to be injected
- the actuating part is pushed further into the compensation chamber so that because of the annular shoulder, the fuel in the compensation chamber is displaced.
- This displacement initially produces a pressure increase in the compensation chamber due to the rigidity of the hydraulic volume and the elastic properties of the fuel contained therein. After this initial pressure increase, the volume of the compensation chamber is displaced as a result of which the compensation piston is also moved.
- the force counteracting this movement acts as a closing force on the actuating member.
- the progression and amount of closing force can be adjusted by means of the volume of the compensation chamber and the embodiment and impingement of the compensation piston.
- the fuel injection valve according to the invention has the advantage that the compensating force can be produced in a simpler manner without the need for a hydraulic chamber between the actuating part and the compensation piston. In particular, this eliminates all the problems that stem from the use of a hydraulic fluid, namely supplying the hydraulic fluid and preventing unintentional escape of the hydraulic fluid.
- the spring element is constituted by at least one Belleville washer, or disk spring.
- a disk spring or a disk spring packet has the advantage that it produces a characteristic curve which, in a particular range, demonstrates a very small increase in the spring force over the spring travel. As a result, an essentially constant closing force can be produced.
- the compensation piston is disposed concentric to the longitudinal axis of the actuating part. This produces a particularly compact design of the fuel injection valve.
- the compensation piston is annular and encompasses the actuating part
- the compensation chamber is an annular chamber which encompasses the actuating part and is closed at one end by the compensation piston
- the actuating part is provided with a collar which supports the spring.
- the actuating part is provided with a support disk, which supports the spring, and the support disk is disposed opposite from the compensation piston which, at its end remote from the injector needle, is provided with an extension that closes one end of the compensation chamber.
- two stops for the compensation piston are embodied on the valve body, which determine the end positions of the compensation piston. Consequently, in the event of an excessively high or excessively low pressure in the compensation volume, there are preset positions the compensation piston which assure a correct operation of the fuel injection valve.
- FIG. 1 is a schematic sectional view of a first embodiment of a fuel injection valve according to the invention
- FIG. 2 is a schematic sectional view of a second embodiment of a fuel injection valve according to the invention.
- FIG. 3 shows the progression of the dynamic opening force for a fuel injection valve according to the invention.
- FIG. 1 shows a 2/2-way fuel injection valve for a so-called “common rail” injection system.
- the injection valve has a valve body 10 which contains a movable injector needle 12 .
- the injector needle cooperates with a valve seat 14 in order to control the injection of fuel, which is supplied via a supply line 16 , into a cylinder of an internal combustion engine, not shown.
- An actuating part 18 is supported on the injector needle 12 and its end face remote from the injector needle 12 closes a control pressure chamber 20 .
- An annular leakage collecting chamber 17 is embodied in the valve body 10 and encompasses the actuating part 18 .
- a feed line 22 connected to the supply line 16 leads to the control pressure chamber 20 and contains an inlet throttle.
- An outlet line 24 leads from the control pressure chamber 20 , has an outlet throttle disposed in it, and is controlled by a control valve 26 .
- the fuel pressure prevailing in the control pressure chamber 20 produces a closing force that is greater than an opening force produced by the fuel in the vicinity of the injector needle 12 .
- the injector needle 12 consequently rests against the valve seat 14 and no fuel is injected.
- the escaping fuel causes the pressure in the control pressure chamber to decrease so that the opening force produced in the vicinity of the injector needle 12 becomes greater than the closing force produced in the vicinity of the control pressure chamber 20 . Consequently, the injector needle 12 can lift up from the valve seat 14 and fuel is injected.
- a closing force is once again exerted on the actuating member 18 which causes the injector needle 12 to close.
- an additional area is produced that is acted on by the fuel pressure, as a result of which an additional opening force is produced.
- This opening force has a dynamic progression and is shown by way of example in FIG. 3 for four different fuel pressures in the common rail injection system by the curves 1 , 2 , 3 , and 4 .
- a compensation system is provided which exerts a compensating force on the actuating member.
- the compensation system is comprised of an annular compensation chamber 30 , which encompasses the actuating member 18 and is closed at one end by an annular compensation piston 32 .
- the compensation chamber 30 communicates with the supply line 16 via a feed line 34 .
- the actuating part 18 is provided with a collar 36 which is disposed in a spring chamber 38 .
- a spring disk packet 40 is disposed between the collar 36 and the end face of the compensation piston 32 oriented toward the injector needle 12 .
- the spring disk packet has a spring rigidity of approximately 4 N per micrometer.
- the spring disk packet 40 When the injector needle 12 opens, the spring disk packet 40 is initially compressed by means of the collar 36 . This produces a compensating force which increases sharply as a function of the spring rigidity of the spring disk packet 40 . In FIG. 3, this is shown on the left side of the curve A for the compensating force.
- the compensation piston 32 moves in the compensation chamber counter to the compressive force produced by the fuel in the compensation chamber 30 .
- the movement of the piston 32 assures that the compensating force is kept at a constant level. This is depicted by the horizontal part of the curve A in FIG. 3 .
- a compensating force is thus produced which depends on the pressure in the supply line 16 and compensates for the dynamic opening force.
- FIG. 2 shows a second embodiment of a fuel injection valve according to the invention. It differs from the first embodiment in terms of the embodiment of the compensation system.
- the actuating part 18 is provided with a support disk 50 on which the disk spring 40 rests.
- the compensation piston 32 which is provided with an extension 52 , is disposed opposite the support disk 50 . This extension 52 closes one end of the compensation chamber 30 .
- the function of the compensation system corresponds to that of the compensation system in the first embodiment.
- One advantage resulting from the use of the mechanical spring 40 is that there are no losses over time during the opening of the valve. Furthermore, during the opening of the injector needle 12 , potential energy which is needed later for the closing is temporarily stored in the spring.
- Valve body 10 has two stops 60 , 62 embodied in it which determine the end positions for the compensation piston 32 .
- the stops assure that it is possible for the compensation system to function even when there is an excessively high or excessively low pressure in the supply line 16 .
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19940293A DE19940293A1 (de) | 1999-08-25 | 1999-08-25 | Kraftstoffeinspritzventil |
DE19940293 | 1999-08-25 | ||
PCT/DE2000/002734 WO2001014719A1 (de) | 1999-08-25 | 2000-08-12 | Kraftstoffeinspritzventil |
Publications (1)
Publication Number | Publication Date |
---|---|
US6722579B1 true US6722579B1 (en) | 2004-04-20 |
Family
ID=7919548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/830,275 Expired - Fee Related US6722579B1 (en) | 1999-08-25 | 2000-08-12 | Fuel injection valve |
Country Status (6)
Country | Link |
---|---|
US (1) | US6722579B1 (de) |
EP (1) | EP1125051A1 (de) |
JP (1) | JP2003507644A (de) |
KR (1) | KR20010080312A (de) |
DE (1) | DE19940293A1 (de) |
WO (1) | WO2001014719A1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090090889A1 (en) * | 2005-07-01 | 2009-04-09 | Mitsuo Shinomiya | Method and agent for chemical conversion treatment and chemically conversion-Treated members |
US20140306034A1 (en) * | 2013-04-11 | 2014-10-16 | Robert Bosch Gmbh | Valve for metering fluid |
WO2016169568A1 (en) * | 2015-04-22 | 2016-10-27 | Man Diesel & Turbo, Filial Af Man Diesel & Turbo Se, Tyskland | A fuel valve for a large two-stroke self-igniting internal combustion engine |
GB2549479A (en) * | 2016-04-18 | 2017-10-25 | Delphi Int Operations Luxembourg Sarl | Fuel injector |
CN109236530A (zh) * | 2018-07-26 | 2019-01-18 | 哈尔滨工程大学 | 喷油规律可变的重油电控喷油器 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10121892A1 (de) * | 2001-05-05 | 2002-11-07 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
JP4167230B2 (ja) | 2004-01-13 | 2008-10-15 | デルファイ・テクノロジーズ・インコーポレイテッド | 燃料噴射装置 |
JP4609351B2 (ja) * | 2006-03-17 | 2011-01-12 | 株式会社デンソー | インジェクタ |
CN112065627A (zh) * | 2020-09-04 | 2020-12-11 | 温州弘腾科技有限公司 | 一种压力平衡喷油嘴的面积补偿制造方法以及由该方法制得的压力平衡喷油 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0393590A2 (de) | 1989-04-17 | 1990-10-24 | Nippondenso Co., Ltd. | Brennstoffeinspritzeinrichtung für Dieselmotoren |
EP0459429A1 (de) | 1990-05-29 | 1991-12-04 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzventil |
EP0529630A1 (de) | 1991-08-30 | 1993-03-03 | Nippondenso Co., Ltd. | Brennstoffeinspritzvorrichtung für Brennkraftmaschine |
WO1994019598A1 (de) * | 1993-02-26 | 1994-09-01 | Siemens Aktiengesellschaft | Vorrichtung zum öffnen und verschliessen einer in einem gehäuse vorhandenen durchtrittsöffnung |
US5479902A (en) * | 1993-08-02 | 1996-01-02 | Daimler-Benz Ag | Fuel injection system for a diesel engine |
US5697554A (en) * | 1995-01-12 | 1997-12-16 | Robert Bosch Gmbh | Metering valve for metering a fluid |
EP0829641A2 (de) | 1996-08-31 | 1998-03-18 | Isuzu Motors Limited | Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen |
US5803361A (en) * | 1996-02-13 | 1998-09-08 | Isuzu Motors Limited | Fuel injector for internal combustion engines |
DE19727896A1 (de) | 1997-07-01 | 1999-01-07 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19907348A1 (de) * | 1999-02-20 | 2000-08-24 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
-
1999
- 1999-08-25 DE DE19940293A patent/DE19940293A1/de not_active Withdrawn
-
2000
- 2000-08-12 WO PCT/DE2000/002734 patent/WO2001014719A1/de not_active Application Discontinuation
- 2000-08-12 US US09/830,275 patent/US6722579B1/en not_active Expired - Fee Related
- 2000-08-12 JP JP2001518568A patent/JP2003507644A/ja active Pending
- 2000-08-12 KR KR1020017005111A patent/KR20010080312A/ko not_active Application Discontinuation
- 2000-08-12 EP EP00967522A patent/EP1125051A1/de not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0393590A2 (de) | 1989-04-17 | 1990-10-24 | Nippondenso Co., Ltd. | Brennstoffeinspritzeinrichtung für Dieselmotoren |
EP0459429A1 (de) | 1990-05-29 | 1991-12-04 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzventil |
EP0529630A1 (de) | 1991-08-30 | 1993-03-03 | Nippondenso Co., Ltd. | Brennstoffeinspritzvorrichtung für Brennkraftmaschine |
WO1994019598A1 (de) * | 1993-02-26 | 1994-09-01 | Siemens Aktiengesellschaft | Vorrichtung zum öffnen und verschliessen einer in einem gehäuse vorhandenen durchtrittsöffnung |
US5479902A (en) * | 1993-08-02 | 1996-01-02 | Daimler-Benz Ag | Fuel injection system for a diesel engine |
US5697554A (en) * | 1995-01-12 | 1997-12-16 | Robert Bosch Gmbh | Metering valve for metering a fluid |
US5803361A (en) * | 1996-02-13 | 1998-09-08 | Isuzu Motors Limited | Fuel injector for internal combustion engines |
EP0829641A2 (de) | 1996-08-31 | 1998-03-18 | Isuzu Motors Limited | Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen |
DE19727896A1 (de) | 1997-07-01 | 1999-01-07 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090090889A1 (en) * | 2005-07-01 | 2009-04-09 | Mitsuo Shinomiya | Method and agent for chemical conversion treatment and chemically conversion-Treated members |
US20140306034A1 (en) * | 2013-04-11 | 2014-10-16 | Robert Bosch Gmbh | Valve for metering fluid |
US9382884B2 (en) * | 2013-04-11 | 2016-07-05 | Robert Bosch Gmbh | Valve for metering fluid |
WO2016169568A1 (en) * | 2015-04-22 | 2016-10-27 | Man Diesel & Turbo, Filial Af Man Diesel & Turbo Se, Tyskland | A fuel valve for a large two-stroke self-igniting internal combustion engine |
DK201500247A1 (en) * | 2015-04-22 | 2016-11-14 | Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland | A fuel valve for a large two-stroke self-igniting internal combustion engine |
DK178692B1 (en) * | 2015-04-22 | 2016-11-21 | Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland | A fuel valve for a large two-stroke self-igniting internal combustion engine |
US10550811B2 (en) | 2015-04-22 | 2020-02-04 | Man Energy Solutions, Filial Af Man Energy Solutions Se, Tyskland | Fuel valve for a large two-stroke self-igniting internal combustion engine |
GB2549479A (en) * | 2016-04-18 | 2017-10-25 | Delphi Int Operations Luxembourg Sarl | Fuel injector |
CN109236530A (zh) * | 2018-07-26 | 2019-01-18 | 哈尔滨工程大学 | 喷油规律可变的重油电控喷油器 |
Also Published As
Publication number | Publication date |
---|---|
KR20010080312A (ko) | 2001-08-22 |
DE19940293A1 (de) | 2001-03-01 |
WO2001014719A1 (de) | 2001-03-01 |
JP2003507644A (ja) | 2003-02-25 |
EP1125051A1 (de) | 2001-08-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ROBERT BOSCH GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MATTES, PATRICK;BOECKING, FRIEDRICH;REEL/FRAME:012125/0355 Effective date: 20010712 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20080420 |